Financial Statement Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) Entity	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Entity	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Inventory estimated net realizable value	$ 120.1		$ 120.1		$ 118.2
Intellectual property estimated net realizable value	11.3		11.3		12.5
Cost of sales	332.1	$ 298.6	655.8	$ 591.4
Selling, general and administrative expenses	$ 12.4	$ 14.6	$ 26.8	30.0
Immaterial error correction			Management concluded that the error correction in 2016 was not material to the full year results of operations.
Number of VIE treated as unconsolidated equity method investment | Entity	1		1
Equity method investment	$ 5.6		$ 5.6		$ 5.0
Beck Trading
Schedule Of Significant Accounting Policies [Line Items]
Equity method investment	5.6		5.6
Maximum loss exposure amount	7.3		7.3
Adjustment To Correct Depreciation Expense Error
Schedule Of Significant Accounting Policies [Line Items]
Cost of sales				3.7
Selling, general and administrative expenses				$ 0.1
Cosmedicine | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Schedule Of Significant Accounting Policies [Line Items]
Inventory estimated net realizable value	0.0		0.0
Cosmedicine | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations | Intellectual Property
Schedule Of Significant Accounting Policies [Line Items]
Intellectual property estimated net realizable value	$ 0.0		$ 0.0